131643 has 6 divisors (see below), whose sum is σ = 190164. Its totient is φ = 87756.

The previous prime is 131641. The next prime is 131671. The reversal of 131643 is 346131.

It is not a de Polignac number, because 131643 - 2¹ = 131641 is a prime.

131643 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (131641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7305 + ... + 7322.

It is an arithmetic number, because the mean of its divisors is an integer number (31694).

2¹³¹⁶⁴³ is an apocalyptic number.

131643 is a deficient number, since it is larger than the sum of its proper divisors (58521).

131643 is a wasteful number, since it uses less digits than its factorization.

131643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14633 (or 14630 counting only the distinct ones).

The product of its digits is 216, while the sum is 18.

The square root of 131643 is about 362.8264047723. The cubic root of 131643 is about 50.8704903166.

Adding to 131643 its reverse (346131), we get a palindrome (477774).

The spelling of 131643 in words is "one hundred thirty-one thousand, six hundred forty-three".